russia denies allegations of unrest. prorussia insurgents releasing international observer ares held hostage in the city. the militant's leader ordered their release because of bleed street battles that are breaking out. here's more from ukraine. >> molly, the only bit of good nows was the release of the international observers. they were in good spirits. >> reporter: it comes as the ukranian military is stepping up the effort against the pro russian mill at this timeiants it was a fight against the insurgies and now this country is on the verge of civil war. ukranian army personnel carriers moved in the town and overtaking checkpoints and a government building that was occupied. they were not able to push their way in the main strong hold where separatist and mill littias are dug in. violence is spreading to the key port city of oshg desza. 30 plus people died and many injured in running street battles between riot police and pro russian separatist. and pro russians ended up in a building and the building was in flames.